diff --git a/doc/fix_viscous.html b/doc/fix_viscous.html
index 16f957e599..89fb55177d 100644
--- a/doc/fix_viscous.html
+++ b/doc/fix_viscous.html
@@ -21,10 +21,6 @@
 
 <LI>gamma = damping coefficient (force/velocity units) 
 
-<LI>zero or more keyword/value pairs can be appended 
-
-<LI>keyword = <I>b</I> or <I>a</I> or <I>t</I> or <I>m</I> 
-
 <LI>zero or more keyword/value pairs may be appended 
 
 <PRE>keyword = <I>scale</I>
diff --git a/doc/fix_viscous.txt b/doc/fix_viscous.txt
index cab8622ce0..1793eea8e7 100644
--- a/doc/fix_viscous.txt
+++ b/doc/fix_viscous.txt
@@ -15,8 +15,6 @@ fix ID group-ID viscous gamma keyword values ... :pre
 ID, group-ID are documented in "fix"_fix.html command :ulb,l
 viscous = style name of this fix command :l
 gamma = damping coefficient (force/velocity units) :l
-zero or more keyword/value pairs can be appended :l
-keyword = {b} or {a} or {t} or {m} :l
 zero or more keyword/value pairs may be appended :l
 keyword = {scale}
   {scale} values = type ratio